Machinery for crushing ores



Patented Apr.4, 1882.

ATTORNEYS.

(No Model.)

P. J. & W. H. HOYT.

MACHINERY FOR GR-USHING 0311s, 8w.

, UNITED STATES PATENT OFFICE.

FREDERICK J. HOYT, OF NE\V YORK, N. Y.,AND WILLIAll'fH. HOYT, OF JERSEYCITY, NE\V JERSEY.

MACHINERY FOR CRUSHING ORES, 86C.

SPECIFICATION forming part of Letters Patent No. 255,862, dated April 4,1882.

I Application filed lilay 14, 1881. (No model.)

To all whom it may concern Be it known that we, FREDERICK J. Hor'r andWILLIAM H. HOYT, citizens of the United States, and residingrespectively at New York city, in the county of New York and State ofNew York, and at Jersey City, in the county of Hudson and State of New'Jersey, haveinvented new and useful Machinery for Crushing Ores, Bones,or other Similar Materials, of which the following is a specification.

This invention relates to machinery for crushing or comminuting ores,bones, or other similar materials; and it consists in the combination,with a vertical rotary shaft,of disks secured thereon and provided witLhammers, and a cylinder provided with lugs or anvils, the said diskssuccessively increasing in diameter from the top to the bottom of theseries, and the said lugs or anvils being graded so as to successivelyextend farther toward the cylinder from the bottom to the top of theseries, all of which will be more fully hereinafter described in detail.

This invention is illustrated in the accompanying drawings, in whichFigure l represents a vertical central section; Fig. 2, ahorizontalsection.

Similar letters indicate corresponding parts.

The letter A designates the vertical shaft or spindle; B, the shell; (3,the crushing-disks; D, the hammers, and E the lugs or anvils.

The shaft A is provided with a pulley, g, for imparting thereto arevolving motion, and

- the crushing-disks'G are fixed thereto by means of a feather-key, h,engaging the hub t of the disks. These disks 0 are inclined from centerto circumference, so that each disk forms a frustum of a cone, and thediameter of the disks gradually increases from the top to the bottom ofthe machine, as shown.

The hammers D are secured to the upper surfaces of the disks, theworkingfaces of the hammers, as well as the anvils E, being preferablymade of steel. The shell B surrounds the shaft A and its concomitants,being concentric therewith, and being, moreover, in this example made insections, and the lugs or anvils E are secured to the inner surface ofthe shell through the medium of dovetailsf, the latter being fitted intosuit able grooves in the shell. These anvils E are so arrangedrelatively to the hammers D that the latter will just rub by the anvilsin the revolution of the disks without grinding, and in most cases asingle hammer to each disk will answer the purpose; but we do not ofcourse confine ourselves to any particular number of hammers. These lugsor anvils E are all graded in regular order from the top to the bottomof the seriestha t is to say, the lugs at the top proiect to thegreatest extent toward the shaft. Thelugs next below extend to a lesserextent toward the same, and so on.

The ore or other material to be crushed is fed through a hopper, K, atthe top of the machine, and as it falls on the upper revolving disk 0the incline of the disk and the centrifugal force tend to carry thematerial toward the edge of the disk, where it is caught between thehammers D and the anvils E, and is reduced to a size sufficient to dropthrough the space left between the outer edge of the disk and the innersurface of the shell to the next lower disk, which, having a greaterdiameter than the upper disk, receives the material, and with itshammers, together with the anvils, acts thereon to further reduce it,and so on until the material has fallen from disk to disk, finallyescaping through a spout, t, which extends from an inclined plate, at,at the bottom of the shell.

The disks have been particularly described as being frusto-conicalshaped; but we do not confine ourselves to this form, as the disks maybe made with their tops perfectly level, or inclined toward the center,it necessary. Without grading or graduating the lugs and the disks, ashereinbefore described, the ore or bone could not be properly ground.

. What we claim as new, and desire to secure by Letters Patent, is-

The'combination, with the vertical rotary shaft, of the disks 0, securedthereon, and provided with hammers D, the cylinder B, and the logs oranvils secured in the cylinder,

the said disks successively increasing in dihave hereunto set our handsthis 13th dayof ameter from the top to the bottom of the se- May, 1881.ries, and the lugs being graded so as to suecessively extend farthertoward the cylinder 5 from the bottom'to the top of the series, sub-Witnesses:

stantially as described. FRANCIS CLARE BOWEN,

In tesiimon'y thnt we claim the foregoing We EDGAR GARRETSON.

i FREDERICK J. HOYT.

WILLIAM H. HOYT.

